/**
 * @author yexiebao
 * @date 2025/5/15
 */
public class ListNode {
    int val;
    ListNode next;
    public ListNode(){}
    public ListNode(int val){
        this.val = val;
    }
    public ListNode(int val,ListNode next){
        this.val = val;
        this.next = next;
    }
}